Effect of Cu on the Microstructure and Mechanical Properties of a Low-Carbon Martensitic Stainless Steel
文献类型：期刊论文
| 作者 | Ma, Jun1,2; Song, Yuanyuan1; Jiang, Haichang1; Rong, Lijian1 |
| 刊名 | MATERIALS
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 15期号:24页码:15 |
| 关键词 | low carbon martensitic stainless steel reversed austenite Cu-rich precipitates mechanical properties |
| DOI | 10.3390/ma15248849 |
| 通讯作者 | Song, Yuanyuan(songyuanyuan@imr.ac.cn) |
| 英文摘要 | Reversed austenite is of vital importance in low-carbon martensitic stainless steel because it improves impact toughness. However, a proper amount of reversed austenite is obtained by tempering at a critical temperature, which reduces the strength of the steel. Therefore, how to improve strength-toughness matching is an important problem. Copper (Cu) is an effective strengthening element in steels. However, there is little in-depth discussion on the role of Cu on the microstructure and mechanical properties of low-carbon martensite steel. In this work, the effect of different Cu content on the reversed austenite formation, tensile strength, and impact toughness of a low-carbon martensitic stainless steel (0Cr13Ni4Mo) was systematically investigated through use of a transmission electron microscope (TEM), transmission Kikuchi diffraction (TKD), atom probe tomography (APT), and other characterization methods and mechanical property tests. The results showed that the addition of Cu decreased the phase transition temperatures of martensite and austenite and increased the volume fraction of the reversed austenite. APT results indicated that Cu-rich clusters first formed with alloying elements such as ferrum (Fe) and nickel (Ni) and then grew to be precipitates through rejection of the alloying elements. The Ni atoms diffused towards the interface between the precipitates and the martensite matrix, which provided heterogeneous nucleation sites for the reversed austenite. Cu precipitations strengthened tensile strength during tempering. However, it generated temper brittleness in the steel at a tempering temperature of 450 degrees C, resulting in the impact energy of the 3Cu-steel being only 7 J. A good combination with higher tensile strength (863 MPa) and ductility (192 J) was obtained when tempering at 600 degrees C in the presence of Cu-rich precipitates and a sufficient volume fraction of the reversed austenite. The results provide guidance for the design of steels with reversed austenite and Cu and promote the development of high-strength and high-toughness steels. |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000903553500001 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/175906]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Song, Yuanyuan |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Jun,Song, Yuanyuan,Jiang, Haichang,et al. Effect of Cu on the Microstructure and Mechanical Properties of a Low-Carbon Martensitic Stainless Steel[J]. MATERIALS,2022,15(24):15. |
| APA | Ma, Jun,Song, Yuanyuan,Jiang, Haichang,&Rong, Lijian.(2022).Effect of Cu on the Microstructure and Mechanical Properties of a Low-Carbon Martensitic Stainless Steel.MATERIALS,15(24),15. |
| MLA | Ma, Jun,et al."Effect of Cu on the Microstructure and Mechanical Properties of a Low-Carbon Martensitic Stainless Steel".MATERIALS 15.24(2022):15. |
入库方式： OAI收割
来源：金属研究所
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